City environment quantized data organization method based on vector and lattice mixed representing

Abstract

The invention discloses an urban environment quantized data organization method represented by vectors and grid hybrids, which includes that (1) construct a three-dimensional urban model; (2) the characteristic substances in the three-dimensional urban model is divided into two types including district environment and indoor architecture environment; for the district environment, precision setting is firstly made and then perform the division of map-layer, and present each divided map layer in a way of grid; for the indoor architecture environment, firstly perform the entity division on a semantic level and then perform the division of map-layer, and the map layer is presented in a way of vector; (3) map the grid-vector-based data map layers on the XML-based space objects one by one, the simulation application of the upper layer is actuated as the description above, and the characteristic substances act as query units so that the related environment information can conveniently be found out. The invention effectively avoids the drawbacks of using grids to describe the properties of urban environment such as large data amount and low precision, and at the same time expands the traditional two-dimensional description of environment information to the three-dimensional so as to be applied to the interactive simulation of the three-dimensional city.

Description

technical field [0001] The invention relates to a method for expressing quantitative data of environmental information in a three-dimensional city, in particular to a method for organizing quantitative data of urban environment based on vector and grid mixed representation, which belongs to the field of computer virtual reality and simulation applications. Background technique [0002] With the continuous development of geographic information system, the expression of environmental information in urban construction becomes more and more complex. Traditionally, the environmental information used in urban construction is mainly the spatial data of urban features projected on a two-dimensional plane. According to the characteristics of different fields of urban construction, the focus and methods of 2D spatial data application are different. For example, in the field of urban planning, urban planning management and design departments apply high-precision two-dimensional spatia...

AI Technical Summary

Problems solved by technology

[0006] The technical problem of the present invention is to overcome the deficiencies of the prior art, and provide a method for organizing quantitative data of urban environment based on vector and grid hybrid representations. This method combines the characteristics of urban environmental information and effectively avoids the complete use of grid methods Describe the shortcomings of the urban environment, such as the shortcomings of large data volume and low accuracy, and at the same time extend the traditional two-dimensional space description of environmental information to three-dimensional space, so as to be suitable for interactive simulation in three-dimensional cities

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